U.S. patent application number 11/375166 was filed with the patent office on 2006-10-05 for foaming o/w emulsion and use thereof in cosmetics.
This patent application is currently assigned to L'OREAL. Invention is credited to Odile Aubrun, Armelle De Salvert, Laurence Sebillotte-Arnaud.
Application Number | 20060223737 11/375166 |
Document ID | / |
Family ID | 37071344 |
Filed Date | 2006-10-05 |
United States Patent
Application |
20060223737 |
Kind Code |
A1 |
Sebillotte-Arnaud; Laurence ;
et al. |
October 5, 2006 |
Foaming O/W emulsion and use thereof in cosmetics
Abstract
Foaming composition for topical application in the form of an
oil-in-water emulsion, where the size of the droplets of the oily
phase D[4,3] is less than or equal to 4 .mu.m, the oily phase is
present in an amount of at least 30% by weight, the composition
containing an emulsifying system with an HLB value ranging from 8
to 18, present in an amount of at least 2% by weight relative to
the total weight of the composition, and a foaming system
comprising at least one anionic surfactant chosen from alkyl glycol
carboxylic acids of formula (I) and salts thereof.
Inventors: |
Sebillotte-Arnaud; Laurence;
(L'Hay les Roses, FR) ; Aubrun; Odile; (Paris,
FR) ; De Salvert; Armelle; (Paris, FR) |
Correspondence
Address: |
C. IRVIN MCCLELLAND;OBLON, SPIVAK, MCCLELLAND, MAIER & NEUSTADT, P.C.
1940 DUKE STREET
ALEXANDRIA
VA
22314
US
|
Assignee: |
L'OREAL
Paris
FR
|
Family ID: |
37071344 |
Appl. No.: |
11/375166 |
Filed: |
March 15, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60681153 |
May 16, 2005 |
|
|
|
Current U.S.
Class: |
510/407 |
Current CPC
Class: |
A61Q 5/02 20130101; A61K
8/06 20130101; A61K 8/062 20130101; A61K 8/365 20130101; A61K 8/046
20130101; A61Q 19/10 20130101 |
Class at
Publication: |
510/407 |
International
Class: |
C11D 17/00 20060101
C11D017/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 25, 2005 |
FR |
0550781 |
Claims
1. A foaming composition in the form of an oil-in-water emulsion,
comprising an oily phase dispersed in an aqueous phase, wherein:
the size of the droplets of the oily phase D[4,3] is less than or
equal to 4 .mu.m, the oily phase (A) is present in an amount of at
least 30% by weight relative to the total weight of the
composition, wherein the composition comprises: an emulsifying
system (B) with an HLB value of 8-18, present in an amount of at
least 2% by weight relative to the total weight of the composition,
a foaming system (C) comprising at least one anionic surfactant
chosen from alkyl glycol carboxylic acids of formula (I) and salts
thereof: R.sub.1--CHOH--CH.sub.2--O--COO.sup.-X.sup.+ (I) in which
R.sub.1 denotes a saturated or unsaturated, linear or branched
alkyl radical having 8 to 30 carbon atoms, and X denotes hydrogen
or a mineral or organic cation, and wherein the oily phase
(A)/foaming system (C) weight ratio is 1.5-12.
2. The composition according to claim 1, prepared by phase
inversion emulsification.
3. The composition according to claim 1, wherein the mean size of
the droplets of oily phase D[4,3] is 0.09 .mu.m-4 .mu.m.
4. The composition according to claim 1, comprising at least one
compound of formula (I) in which R.sub.1 denotes a saturated or
unsaturated, linear or branched alkyl radical having 8 to 18 carbon
atoms.
5. The composition according to claim 1, comprising sodium lauryl
glycol carboxylate, and/or its acid form.
6. The composition according to claim 1, wherein the foaming system
further comprises one or more foaming surfactants chosen from alkyl
polyglucosides, betaine derivatives, alkyl phosphates and alkyl
ether sulfates, and mixtures thereof.
7. The composition according to claim 1, wherein the amount of
foaming system is 0.5%-20% by weight relative to the total weight
of the composition.
8. The composition according to claim 1, wherein the oily phase
(A)/foaming system (C) weight ratio is 4-10.
9. The composition according to claim 1, wherein the emulsifying
system comprises at least one chosen from ethoxylated fatty
alcohols, ethoxylated fatty acids, partial glycerides of
ethoxylated fatty acids, triglycerides of polyglycerolated fatty
acids and ethoxylated derivatives thereof, and mixtures
thereof.
10. The composition according to claim 1, wherein the emulsifying
system comprises at least one chosen from the products of addition
of ethylene oxide with lauryl alcohol; the products of addition of
ethylene oxide with behenyl alcohol; the products of addition of
ethylene oxide with cetearyl alcohol; the products of addition of
ethylene oxide with cetyl alcohol; the products of addition of
ethylene oxide with stearyl alcohol; the products of addition of
ethylene oxide with isostearyl alcohol; the products of addition of
ethylene oxide with lauric acid, palmitic acid, stearic acid or
behenic acid, and mixtures thereof.
11. The composition according to claim 1, wherein the emulsifying
system comprises one or more coemulsifiers chosen from fatty
alcohols containing 8 to 30 carbon atoms; fatty acids containing 8
to 30 carbon atoms; fatty esters of glycerol; oxyethylenated
derivatives thereof containing 2 to 8 ethylene oxide groups, and
mixtures thereof.
12. The composition according to claim 1, wherein the amount of
emulsifying system is 2% to 20% by weight relative to the total
weight of the composition.
13. The composition according to claim 1, wherein the emulsifying
system (B)/oily phase (A) ratio is 0.04 to 0.2.
14. The composition according to claim 1, wherein the amount of
oily phase ranges from 30% to 70% by weight relative to the total
weight of the composition.
15. The composition according to claim 1, wherein the oily phase
comprises one or more oils with a molecular weight of greater than
or equal to 360 g/mol.
16. The composition according to claim 1, wherein the oily phase
comprises at least one oil chosen from liquid petroleum jelly,
2-ethylhexyl palmitate and cetyl 2-ethylhexanoate, and mixtures
thereof.
17. The composition according to claim 1, wherein it comprises an
amount of water of less than or equal to 45% of the total weight of
the composition.
18. The composition according to claim 1, wherein said composition
is a skin cleansing and/or makeup-removing product, a shower
product, a shampoo or hair conditioner, a shaving product, a
rinse-off mask or an exfoliant product.
19. A process for cleansing a keratin material, wherein a
composition according to claim 1 is applied to the keratin
material, and is rinsed off.
Description
REFERENCE TO PRIOR APPLICATIONS
[0001] This application claims priority to U.S. provisional
application 60/681,153 filed May 16, 2005, and to French patent
application 0550781 filed Mar. 25, 2005, both incorporated herein
by reference.
FIELD OF THE INVENTION
[0002] The present invention relates to a foaming composition.
Preferably, this composition is suitable for topical application,
especially cosmetic and/or dermatological application, and is in
the form of an oil-rich oil-in-water emulsion, which may be
obtained by phase inversion. The invention also relates to the use
of the described compositions in cosmetics and dermatology.
[0003] Additional advantages and other features of the present
invention will be set forth in part in the description that follows
and in part will become apparent to those having ordinary skill in
the art upon examination of the following or may be learned from
the practice of the present invention. The advantages of the
present invention may be realized and obtained as particularly
pointed out in the appended claims. As will be realized, the
present invention is capable of other and different embodiments,
and its several details are capable of modifications in various
obvious respects, all without departing from the present invention.
The description is to be regarded as illustrative in nature, and
not as restrictive.
BACKGROUND OF THE INVENTION
[0004] Cleansing of the skin is very important for facial care, and
should be as efficient as possible since greasy residues such as
excess sebum, residues of the cosmetic products used daily and
makeup products, especially "waterproof" products, accumulate in
the folds of the skin and can block the skin pores and lead to the
formation of spots.
[0005] In the field of cleansing, it is known practice to use
foaming aqueous gels. Their cleansing action is provided by the
Surfactants they contain, these surfactants placing in suspension
the greasy residues and the pigments of makeup products. However,
these gels often have the drawback of leaving the skin dry and of
giving sensations of tautness. Furthermore, their makeup-removing
power is not always sufficient.
[0006] Moreover, in the field of makeup removal, it is known
practice to use milks or creams (non-foaming products). These
products are more comfortable than aqueous gels, but often have the
drawback of leaving an excessively greasy residue after application
to the skin, and it is then necessary to use a tonic to remove the
surplus residual fatty substance.
[0007] As a result, it is sought to make two-in-one products, which
are both foaming and cleansing while at the same time providing a
care function and/or which remove makeup without leaving an
excessively greasy residue.
[0008] One of the means for providing this care function in foaming
products is to incorporate oil therein and thus to prepare
emulsions. Products of this type already exist, and they may be
used as care cleansing products both for the face and for the body
since they leave a small amount of oil on the surface of the skin,
or alternatively as rinse-off makeup-removing products. However,
these products are not satisfactory as regards the foam initiation
and/or the volume of foam obtained since the presence of oils
hinders good foam development. In addition, the amount of oils
therein is generally limited precisely by the problems posed by the
presence of oil as regards foam development.
[0009] Thus, document FR-A-2 733 417 describes foaming oil-in-water
emulsions in the form of creams, comprising foaming nonionic
surfactants, oils with given solubility parameters, and crosslinked
polymers, especially vinyl polymers, as gelling agents. However,
these compositions have the drawback of not giving a satisfactory
foam, and especially of having poor foam initiation and giving a
low volume of foam.
OBJECTS OF THE INVENTION
[0010] There is thus still a need to make products which, while
being just as gentle as non-foaming products such as creams or
milks, have good foaming properties with a good quality of foam,
while at the same time having good tolerance and containing a large
amount of oil.
SUMMARY OF THE INVENTION
[0011] It has been found, surprisingly, that the problem posed is
addressed by using an emulsion having small-sized droplets of oily
phase, containing a combination of at least one alkyl polyglucoside
and of at least one alkyl glycol carboxylic acid, as foaming
surfactants, this emulsion being rich in oils and possibly being
obtained especially by means of the phase inversion temperature.
The compositions obtained have better foam qualities than those of
the prior art and good tolerance properties.
[0012] Thus, the compositions obtained are very gentle and can be
appreciated by any skin type and in particular by dry skin and
sensitive skin.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] One subject of the present invention is a foaming
composition, preferably suitable for topical application, in the
form of an oil-in-water emulsion, the composition comprising an
oily phase dispersed in an aqueous phase, preferably wherein:
[0014] the size of the droplets of the oily phase D[4,3] is less
than or equal to 4 .mu.m, and/or
[0015] the oily phase (A) is present in an amount of at least 30%
by weight relative to the total weight of the composition, and/or
in that the composition comprises:
[0016] an emulsifying system (B) with an HLB value ranging from 8
to 18, present in an amount of at least 2% by weight relative to
the total weight of the composition, and/or
[0017] a foaming system (C) comprising at least one foaming
surfactant chosen from alkyl glycol carboxylic acids and salts
thereof, of formula (I) below:
R.sub.1--CHOH--CH.sub.2--O--COO.sup.-X.sup.+ (I) in which R.sub.1
denotes a saturated or unsaturated, linear or branched alkyl
radical containing from 8 to 30 carbon atoms, and X denotes
hydrogen or a mineral or organic cation, and/or
[0018] the oily phase (A)/foaming system (C) weight ratio ranging
from 1.5 to 12.
[0019] Since the compositon is preferably intended for topical
application, the composition of the invention preferably contains a
physiologically acceptable medium. The term "physiologically
acceptable medium" means a medium that is suitable for topical
application to the skin or the integuments, i.e. compatible with
the skin, mucous membranes, the lips, the eyelashes, the eyes, the
hair and the nails. This composition may especially constitute a
cosmetic or dermatological composition.
[0020] In the present patent application, the term "oily phase"
means the phase containing lipophilic compounds, which are
especially oils (lipophilic constituents that are liquid at room
temperature), gums, pastes and waxes. They are, for example,
triglycerides, hydrocarbons, esters, ethers, silicones, as
described later, and any lipophilic additive possibly present,
preferably provided that these compounds do not harm the formation
of the foam. The emulsifiers and coemulsifiers of the emulsifying
system do not form part of the oily phase (A) as defined above.
[0021] The O/W emulsions according to the invention comprise an
oily phase (or lipophilic phase) dispersed in an aqueous phase.
They are preferably obtained via the phase inversion temperature
technique, and are preferably characterized by: [0022] their
viscosity: they are mainly creams, [0023] their pH, which ranges
from 5 to 10.5 and preferably from 5 to 9, and/or [0024] the small
size of the droplets of the oily phase, of less than or equal to 4
.mu.m, and/or [0025] their stability: after two months at
45.degree. C., no macroscopic phase separation or change in texture
such as the appearance of grains takes place, and/or [0026] their
high makeup-removing power.
[0027] The principle of emulsification by means of the phase
inversion temperature (or PIT) is, in its principle, well known to
those skilled in the art; it was described in 1968 by K. Shinoda
(J. Chem. Soc. Jpn., 1968, 89, 435). It has been shown that this
emulsification technique makes it possible to obtain stable fine
emulsions (K. Shinoda and H. Saito, J. Colloid Interface Sci.,
1969, 30, 258). This technique was applied in cosmetics as early as
1972 by Mitsui et al. ("Application of the
phase-inversion-temperature method to the emulsification of
cosmetics"; T. Mitsui, Y. Machida and F. Harusawa, American Cosmet.
Perfum., 1972, 87, 33).
[0028] The principle of this technique is as follows: a mixture of
an aqueous phase and an oily phase is prepared and is brought to a
temperature above the PIT temperature, the phase inversion
temperature of the system, which is the temperature at which the
equilibrium between the hydrophilic and lipophilic properties of
the emulsifier(s) used is reached; at elevated temperature, i.e.
above the phase inversion temperature (>PIT), the emulsion is of
water-in-oil type, and, during its cooling, this emulsion inverts
at the phase inversion temperature, to become an emulsion of
oil-in-water type, and in doing so by passing previously through a
state of microemulsion. This process allows emulsions with a
diameter of less than 4 .mu.m to be readily obtained.
[0029] Emulsions obtained according to the invention, despite the
large amount of oils they contain, are preferably stable. The term
"stable composition" means a composition that remains
macroscopically uniform after 2 months at 45.degree. C. Such
stability means that no macroscopic phase separation or change in
texture, such as the appearance of grains, takes place after this
time interval.
[0030] The compositions according to the invention may be in the
form of opaque to translucent, more or less thick creams, and they
may or may not flow under their own weight depending on their
viscosity. The viscosity, measured at 25.degree. C. with a Rheomat
180 viscometer at 200 rpm (revolutions per minute), is greater than
or equal to 1 Pas. The Rheomat 180 machine is equipped with a
different spindle depending on the viscosity, for example a No. 3
spindle for the viscosity range from 0.2 to 4 Pas and a No. 4
spindle for the range of viscosities greater than 2 Pas. When
measured under the conditions indicated above, the viscosity of the
compositions of the invention may range, for example, from 1 to 200
Pas and preferably from 5 to 180 Pas. This viscosity is generally
measured 10 minutes after switching on the rotation of the
spindle.
[0031] The mean size of the droplets of oily phase and their
polydispersity are measured, for example, by light scattering using
a Mastersizer 2000 granulometer (sold by Malvern Instruments).
These measurements are performed on the emulsion diluted in a
solution of SDS (sodium dodecyl sulfate) at 1% in water. The mean
volume diameter D[4,3] (.mu.m) is determined by means of software
(see Operators Guide, Malvern Instruments, December 1998, pp. 61 to
67).
[0032] The mean size D[4,3] (.mu.m) of the droplets of oily phase
of the composition of the invention is less than or equal to 4
.mu.m and ranges especially from 0.09 .mu.m to 4 .mu.m, more
particularly from 0.1 .mu.m to 2 .mu.m and preferably from 0.1
.mu.m to 1 .mu.m.
[0033] The polydispersity is defined herein by the absolute
deviation relative to the median or "uniformity". This value should
be less than 1.
Foaming System
[0034] In the composition according to the invention, the weight
ratio of the amount of oily phase (A) to the amount of foaming
system (C) preferably ranges from 1.5 to 12 and more preferably
from 4 to 10.
[0035] The term "foaming system" means all of the foaming
surfactants. The foaming system (C) comprises at least one anionic
surfactant chosen from alkyl glycol carboxylic acids and salts
thereof. This system may comprise only one or more anionic
surfactants chosen from alkyl glycol carboxylic acids and salts
thereof, or it may comprise a mixture of one or more surfactants of
this type and of other foaming surfactants.
[0036] Foaming surfactants are generally hydrophilic and thus
present in the aqueous phase.
Alkyl Glycol Carboxylic Acids
[0037] Alkyl glycol carboxylic acids (or
2-(2-hydroxyalkyloxyacetic) acids) and salts thereof include
foaming surfactants of formula (I) below:
R.sub.1--CHOH--CH.sub.2--O--COO.sup.-X.sup.+ (I) in which R.sub.1
denotes a saturated or unsaturated, linear or branched alkyl
radical containing from 8 to 30 carbon atoms, and X denotes
hydrogen or a mineral or organic cation such as those derived from
an alkali metal (for example Na.sup.+ or K.sup.+), NH.sub.4.sup.+,
ammoniums derived from basic amino acids such as lysine, arginine
or sarcosine, or alternatively amino alcohols such as
monoethanolamine, diethanolamine, triethanolamine, glucamine,
N-methylglucamine or 3-amino-1,2-propanediol.
[0038] The 2-hydroxyalkylcarboxylic acids that are preferred
according to the present invention are compounds of formula (I) in
which R.sub.1 more particularly denotes a saturated or unsaturated,
linear or branched alkyl radical containing from 8 to 18 carbon
atoms.
[0039] Among the surfactants of formula (I), mention may be made
especially of sodium lauryl glycol carboxylate, sold under the
names Beaulight Shaa.RTM. or Beaulight LCA-25N.RTM. by the company
Sanyo, or its corresponding acid form sold under the name Beaulight
Shaa (Acid Form).RTM. by the company Sanyo.
[0040] The amount (as active material) of anionic surfactants of
alkyl glycol carboxylic type may range, for example, from 0.5% to
20% by weight, preferably from 1% to 15% by weight and better still
from 2% to 10% by weight relative to the total weight of the
composition.
Other Foaming Surfactants
[0041] The composition may contain other foaming surfactants, which
may be chosen from nonionic, amphoteric or zwitterionic, anionic
and cationic foaming surfactants.
[0042] The composition may contain only anionic surfactants of
alkyl glycol carboxylic type, or alternatively it may contain a
mixture of foaming surfactants including anionic surfactants of
alkyl glycol carboxylic type. The total amount of foaming
surfactants (as active material) may range, for example, from 0.5%
to 20% by weight, preferably from 1% to 15% by weight and better
still from 5% to 15% by weight relative to the total weight of the
composition.
[0043] As nonionic foaming surfactants, the composition may
contain, for example, one or more nonionic surfactants chosen from
alkyl polyglucosides (APG), maltose esters, polyglycerolated fatty
alcohols, and glucamine derivatives, for instance
2-ethylhexyloxycarbonyl-N-methylglucamine, and mixtures
thereof.
[0044] Alkylpolyglucosides that are preferably used include those
containing an alkyl group containing from 6 to 30 carbon atoms and
preferably from 8 to 16 carbon atoms, and containing a hydrophilic
group (glucoside) preferably comprising 1.2 to 3 glucoside units.
Examples of alkylpolyglucosides that may be mentioned include
decylglucoside (Alkyl-C9/C11-polyglucoside (1.4)) for instance the
product sold under the name Mydol 10.RTM. by the company Kao
Chemicals, the product sold under the name Plantaren 2000 UP.RTM.
by the company Cognis, and the product sold under the name Oramix
NS 10.RTM. by the company SEPPIC; caprylyl/capryl glucoside, for
instance the product sold under the name Oramix CG 110.RTM. by the
company SEPPIC; lauryl glucoside, for instance the products sold
under the names Plantaren 1200 N.RTM. and Plantacare 1200.RTM. by
the company Cognis; cocoglucoside, for instance the product sold
under the name Plantacare 818/UP.RTM. by the company Cognis; and
mixtures thereof.
[0045] The maltose derivatives are, for example, those described in
document EP-A-566 438, such as O-octanoyl-6'-D-maltose or
O-dodecanoyl-6'-D-maltose described in document FR-A-2 739 556.
[0046] An example of a polyglycerolated fatty alcohol that may be
mentioned is polyglycerolated (3.5 mol of glycerol) dodecanediol,
this product being sold under the name Chimexane NF.RTM. by the
company Chimex.
[0047] The amphoteric and zwitterionic foaming surfactants may be
chosen, for example, from betaine derivatives including
amidopropylbetaines, amphoacetates and hydroxylsultaines, and
mixtures thereof.
[0048] Examples of betaine derivatives that may be mentioned
include, for example, cocobetaine, for instance the product sold
under the name Dehyton AB-30.RTM. by the company Cognis;
laurylbetaine, for instance the product sold under the name Genagen
KB.RTM. by the company Clariant; oxyethylenated (10 EO)
laurylbetaine, for instance the product sold under the name Lauryl
ether (10 OE) betaine.RTM. by the company Shin Nihon Rica;
oxyethylenated (10 EO) stearylbetaine, for instance the product
sold under the name Stearyl ether (10 OE) betaine.RTM. by the
company Shin Nihon Rica; the cocamidopropyl betaine sold, for
example, under the name Velvetex BK 35.RTM. by the company Cognis;
the undecylenamidopropyl betaine sold, for example, under the name
Amphoram U.RTM. by the company Ceca; and mixtures thereof.
[0049] Examples of alkyl amphoacetates that may be mentioned
include N-disodium
N-cocoyl-N-carboxymethoxy-ethyl-N-carboxymethylethylenediamine
(CTFA name: disodium cocamphodiacetate), for instance the product
sold under the name Miranol C2M Concentrate NP.RTM. by the company
Rhodia Chimie; N-sodium
N-cocoyl-N-hydroxyethyl-N-carboxymethylethylenediamine (CTFA name:
sodium cocamphoacetate), and mixtures thereof.
[0050] The anionic surfactants may be chosen, for example, from
soaps (alkali metal salts of fatty acids), amino acid derivatives,
for instance acylamino acids such as glycinates, amido ether
carboxylates, alkyl polyamino carboxylates, alkyl ether sulfates
such as sodium laureth sulfates, alkyl sulfonates, isethionates,
alkyl methyltaurates, alkyl sulfosuccinates, alkyl sulfoacetates,
alkyl phosphates (monoalkyl phosphates or dialkyl phosphates),
salts thereof, and mixtures thereof.
[0051] According to one preferred embodiment of the invention, the
foaming surfactants other than the 2-hydroxyalkylcarboxylic acids
are chosen from alkylpolyglucosides, betaine derivatives, alkyl
phosphates and alkyl ether sulfates and mixtures thereof.
Emulsifying System
[0052] The emulsifying system (B) contains one or more emulsifiers.
Emulsifiers, like foaming surfactants, are amphiphilic, i.e. they
have a hydrophilic part and a lipophilic part. However, they do not
have any foaming property, but they have the particular feature of
facilitating the dispersion of two mutually insoluble phases, which
foaming surfactants that are detergents do not do. The difference
between emulsifiers and foaming surfactants (or detergents) lies in
the difference in their HLB (hydrophilic-lipophilic balance) and/or
the difference in their fatty chain length. The HLB is the ratio
between the hydrophilic part and the lipophilic part in their
molecule. This term HLB is well known to those skilled in the art
and is described in "The HLB system. A time-saving guide to
Emulsifier Selection" (published by ICI Americas Inc: 1984). For
emulsifiers, the HLB generally ranges from 3 to 8 for the
preparation of W/o emulsions and from 8 to 18 for the preparation
of O/W emulsions, whereas foaming surfactants generally have an HLB
of greater than 20 and/or a fatty chain containing from 8 to 14
carbon atoms.
[0053] The emulsifying system (B) used in the composition according
to the invention comprises one or more emulsifiers whose solubility
in the oil increases as the temperature increases, these
emulsifiers allowing the production of emulsions by means of the
phase inversion temperature. The HLB (hydrophilic-lipophilic
balance) of the emulsifying system ranges from 8 to 18 and
preferably from 10 to 16. The emulsifiers of the emulsifying system
may be chosen especially from ethoxylated fatty alcohols,
ethoxylated fatty acids, partial glycerides of ethoxylated fatty
acids, triglycerides of polyglycerolated fatty acids and
ethoxylated derivatives thereof, and mixtures thereof.
[0054] The emulsifiers are preferably chosen from ethoxylated fatty
alcohols and ethoxylated fatty acids having the formulae (I) and
(II) below: R--O--(CH.sub.2--CH.sub.2O).sub.mH (I)
R--COO--(CH.sub.2--CH.sub.2--O).sub.mH (II) in which R is a linear
or branched, saturated or unsaturated hydrocarbon-based chain
containing from 10 to 24 carbon atoms, and m is an integer ranging
from 8 to 50.
[0055] Examples of ethoxylated fatty alcohols that may be mentioned
include the products of addition of ethylene oxide with lauryl
alcohol, especially those containing from 9 to 50 oxyethylene
groups and more particularly those containing from 10 to 12
oxyethylene groups (laureth-10 to laureth-12, as the CTFA names);
the products of addition of ethylene oxide with behenyl alcohol,
especially those containing from 9 to 50 oxyethylene groups
(beheneth-9 to beheneth-50, as the CTFA names); the products of
addition of ethylene oxide with cetearyl alcohol (mixture of cetyl
alcohol and stearyl alcohol), especially those containing from 10
to 30 oxyethylene groups (ceteareth-10 to ceteareth-30, as the CTFA
names); the products of addition of ethylene oxide with cetyl
alcohol, especially those containing from 10 to 30 oxyethylene
groups (ceteth-10 to ceteth-30, as the CTFA names); the products of
addition of ethylene oxide with stearyl alcohol, especially those
containing from 10 to 30 oxyethylene groups (steareth-10 to
steareth-30, as the CTFA names); the products of addition of
ethylene oxide with isostearyl alcohol, especially those containing
from 10 to 50 oxyethylene groups (isosteareth-10 to isosteareth-50,
as the CTFA names); and mixtures thereof.
[0056] Examples of ethoxylated fatty acids that may be mentioned
include the products of addition of ethylene oxide with lauric
acid, palmitic acid, stearic acid or behenic acid, and mixtures
thereof, especially those containing from 9 to 50 oxyethylene
groups, such as PEG-9 to PEG-50 laurate (as the CTFA names: PEG-9
laurate to PEG-50 laurate); PEG-9 to PEG-50 palmitate (as the CTFA
names: PEG-9 palmitate to PEG-50 palmitate); PEG-9 to PEG-50
stearate (as the CTFA names: PEG-9 stearate to PEG-50 stearate);
PEG-9 to PEG-50 palmitostearate; PEG-9 to PEG-50 behenate (as the
CTFA names: PEG-9 behenate to PEG-50 behenate); and mixtures
thereof.
[0057] Mixtures of these oxyethylenated derivatives of fatty
alcohols and of fatty acids may also be used.
[0058] According to one preferred embodiment of the invention, the
emulsifying system of the composition of the invention contains as
emulsifier at least one ethoxylated fatty alcohol and preferably at
least behenyl alcohol.
[0059] The emulsifying system may also optionally contain one or
more coemulsifiers. Examples of coemulsifiers that may be mentioned
include fatty alcohols containing from 12 to 30 carbon atoms, for
instance cetyl alcohol, stearyl alcohol or behenyl alcohol; fatty
acids containing from 8 to 30 carbon atoms, for instance palmitic
acid, stearic acid or behenic acid; fatty esters of glycerol, for
instance glyceryl stearate; oxyethylenated derivatives of these
fatty alcohols, fatty acids and fatty esters of glycerol,
containing 2 to 8 ethylene oxide groups, and mixtures thereof.
[0060] The emulsifying system (comprising emulsifiers and
coemulsifiers) is generally present in an amount ranging for
example from 2% to 20%, preferably from 3% to 16% and better still
from 3% to 11% by weight relative to the total weight of the
composition.
[0061] According to one preferred embodiment of the invention, the
emulsifier system (B)/oily phase (A) ratio ranges from 0.04 to 0.2
and preferably from 0.06 to 0.18. As indicated above, the term
"oily phase" means all of the constituents that are not hydrophilic
and that are different from the emulsifiers or coemulsifiers of the
emulsifying system.
Oily Phase
[0062] The oily phase, also known as the lipophilic or fatty phase,
comprises lipophilic constituents, i.e. oils and other lipophilic
substances present in the composition, and also the lipophilic
additives that may be present. The oily phase contains at least one
oil, especially a cosmetic oil.
[0063] The term "oil" means a fatty substance that is liquid at
room temperature (20 to 25.degree. C.).
[0064] According to one preferred embodiment of the invention, the
oily phase of the composition according to the invention comprises
at least one oil chosen from hydrocarbon-based oils of mineral or
synthetic origin or alkanes, fatty esters and fatty ethers, and
mixtures thereof. The term "hydrocarbon-based oil" means any oil
predominantly containing carbon and hydrogen atoms, and possibly
ester, ether or fluoro groups.
[0065] The linear or branched hydrocarbon-based oils (alkanes), of
mineral or synthetic origin, may be chosen, for example, from
volatile or non-volatile liquid paraffins and derivatives thereof,
petroleum jelly, liquid petroleum jelly (mineral oil),
perhydrosqualene, polydecenes, isohexadecane, isododecane, and
hydrogenated polyisobutene (or hydrogenated isoparaffin) such as
Parleam oil.
[0066] The fatty esters may be chosen, for example, from those
obtained from an alcohol containing a linear or branched, saturated
or unsaturated chain containing from 1 to 24 carbon atoms and from
a fatty acid containing a linear or branched chain containing from
3 to 24 carbon atoms.
[0067] Examples of fatty esters that may be mentioned include
2-ethylhexyl caprate/caprylate (or octyl caprate/caprylate), ethyl
laurate, butyl laurate, hexyl laurate, isohexyl laurate, isopropyl
laurate, methyl myristate, ethyl myristate, butyl myristate,
isobutyl myristate, isopropyl myristate, 2-octyldodecyl myristate,
2-ethylhexyl monococoate (or octyl monococoate), methyl palmitate,
ethyl palmitate, isopropyl palmitate, isobutyl palmitate,
2-ethylhexyl palmitate (or octyl palmitate), butyl stearate,
isopropyl stearate, isobutyl stearate, 2-ethylhexyl stearate (or
octyl stearate), isopropyl isostearate, isocetyl stearate,
isostearyl isostearate, 2-ethylhexyl pelargonate (or octyl
pelargonate), 2-ethylhexyl hydroxystearate (or octyl
hydroxystearate), decyl oleate, diisopropyl adipate,
bis(2-ethylhexyl) adipate (or dioctyl adipate), diisocetyl adipate,
2-ethylhexyl succinate (or octyl succinate), diisopropyl sebacate,
2-ethylhexyl malate (or octyl malate), pentaerythrityl
caprate/caprylate, 2-ethylhexyl hexanoate (or octyl hexanoate),
octyldodecyl octanoate, isodecyl neopentanoate, isostearyl
neopentanoate, octyldodecyl neopentanoate, isononyl isononanoate,
isotridecyl isononanoate, cetearyl isononanoate, isodecyl
isononanoate, isotridecyl isononanoate, lauryl lactate, myristyl
lactate, cetyl lactate, myristyl propionate, 2-ethylhexyl
2-ethylhexanoate (or octyl 2-ethylhexanoate), 2-ethylhexyl
octanoate (or octyl octanoate), cetyl 2-ethylhexanoate,
pentaerythrityl tetraisostearate, isopropyl lauroyl sarcosinate
(Eldew SL 205 from the company Unipex), dicaprylyl carbonate
(Cetiol CC from the company Cognis) and C12-C15 fatty alkyl
benzoates (Finsolv TN from the company Finetex).
[0068] A fatty ether that may be mentioned is dicaprylyl ether
(Cetiol OE from the company Cognis).
[0069] The following oils may also be used in the oily phase
(A):
[0070] hydrocarbon-based oils of plant origin such as sweet almond
oil, avocado oil, castor oil, coriander oil, olive oil, jojoba oil,
sesame oil, groundnut oil, grapeseed oil, rapeseed oil, coconut
oil, hazelnut oil, shea butter, palm oil, apricot kernel oil,
beauty-leaf oil, rice bran oil, corn germ oil, wheatgerm oil,
soybean oil, sunflower oil, evening primrose oil, safflower oil,
passionflower oil, rye oil, and caprylic/capric acid triglycerides,
for instance those sold by the company Stearineries Dubois or those
sold under the names Miglyol 810, 812 and 818 by the company
Dynamit Nobel;
[0071] volatile or non-volatile silicone oils, with the proviso
that they do not harm the foam quality, for instance volatile or
non-volatile polydimethylsiloxanes (PDMS) with a linear or cyclic
silicone chain, which are liquid or pasty at room temperature,
especially cyclopolydimethylsiloxanes (cyclomethicones) such as
cyclohexasiloxane; polydimethylsiloxanes comprising alkyl, alkoxy
or phenyl groups, which are pendent or at the end of a silicone
chain, these groups containing from 2 to 24 carbon atoms; phenyl
silicones, for instance phenyl trimethicones, phenyl dimethicones,
phenyltrimethylsiloxydiphenylsiloxanes, diphenyl dimethicones,
diphenylmethyldiphenyltrisiloxanes, 2-phenylethyltrimethyl
siloxysilicates and polymethylphenylsiloxanes;
[0072] fluoro oils, with the proviso that they do not harm the foam
quality, such as partially hydrocarbon-based and/or silicone-based
fluoro oils, for instance those described in document JP-A-2 295
912.
[0073] In order to obtain a better foam quality, it is advantageous
for the oily phase of the composition of the invention to contain
one or more oils with a molecular weight of greater than or equal
to 360 g/mol, chosen especially from alkanes and fatty acid esters
with a molecular weight of greater than or equal to 360 g/mol.
[0074] Alkanes that are preferably used include petroleum jelly,
liquid petroleum jelly and hydrogenated isoparaffin (or
hydrogenated polyisobutene) such as Parleam oil. Liquid petroleum
jelly has the advantage of giving a covering foam and good foam
initiation.
[0075] Examples of fatty esters with a molecular weight of greater
than or equal to 360 g/mol that may be mentioned include
2-ethylhexyl palmitate (or octyl palmitate), cetyl
2-ethylhexanoate, 2-octyldodecyl myristate, isocetyl stearate,
isostearyl isostearate, 2-ethylhexyl stearate (or octyl stearate),
octyldodecyl neopentanoate, cetearyl isononanoate, isodecyl
isononanoate, pentaerythrityl tetraisostearate and isotridecyl
isononanoate.
[0076] Preferably, the composition according to the invention
contains one or more fatty esters chosen from those mentioned
above. More preferentially, the oily phase of the composition of
the invention contains at least one oil chosen from liquid
petroleum jelly (mineral oil), 2-ethylhexyl palmitate (or octyl
palmitate) and cetyl 2-ethylhexanoate (or cetyl octanoate), and
mixtures thereof.
[0077] The oily phase may comprise lipophilic additives.
[0078] The oily phase is preferably present in an amount of at
least 30% by weight, more preferably more than 30% by weight and
better still at least 35% by weight relative to the total weight of
the composition. The amount of oily phase may range, for example,
from 32% to 70% by weight, preferably from 35% to 70%, better still
from 35% to 60% by weight and better still from 40% to 60% by
weight relative to the total weight of the composition.
Aqueous Phase
[0079] The aqueous phase comprises water, the foaming surfactants
and the hydrophilic compounds that may be present. The composition
according to the invention generally comprises an amount of water
of less than or equal to 45% and preferably less than or equal to
30% of the total weight of the composition, this amount possibly
ranging, for example, from 10% to 45% by weight and preferably from
10% to 30% by weight relative to the total weight of the
composition.
[0080] According to one preferred embodiment of the invention, the
composition of the invention contains at least one polyol (or
polyhydric alcohol), which is generally present in the aqueous
phase. Examples of polyols that may be mentioned include glycerol;
glycols, for instance propylene glycol, butylene glycol, isoprene
glycol and polyethylene glycols such as PEG-8; sorbitol; sugars
such as glucose, fructose, maltose, lactose or sucrose; and
mixtures thereof. When they are present, the amount of polyol(s) in
the composition of the invention may range, for example, from 0.01%
to 30% by weight, preferably from 2% to 20% by weight and better
still from 5% to 15% by weight relative to the total weight of the
composition.
[0081] The aqueous phase may conventionally contain, besides water
and the polyols(s), one or more water-soluble solvents chosen from
water-soluble lower alcohols. The term "lower alcohol" means an
alcohol containing from 1 to 8 carbon atoms. Examples of lower
alcohols that may be mentioned include ethanol, isopropanol and
butanol, and mixtures thereof. When they are present in the
composition of the invention, the water-soluble lower alcohol(s)
may be in an amount ranging from 0.01% to 20% by weight and
preferably from 0.1% to 10% by weight relative to the total weight
of the composition, with the proviso that they do not harm either
the foam quality or the stability of the composition.
Additives
[0082] The composition according to the invention may also contain
any adjuvant or additive such as those usually used in the fields
under consideration and especially in cosmetics or dermatology.
Needless to say, a person skilled in the art will take care to
select the optional additive(s) of the composition according to the
invention such that the advantageous properties intrinsically
associated with the composition in accordance with the invention
are not, or are not substantially, adversely affected by the
envisaged addition.
[0083] Among the conventional adjuvants that may be contained in
the aqueous phase and/or in the oily phase of the emulsions in
accordance with the invention (depending on the water-soluble or
liposoluble nature of these adjuvants), mention may be made of
preserving agents; sequestrants (EDTA); antioxidants; fragrances;
dyestuffs such as soluble dyes, pigments and nacres; fillers with a
matting, tensioning, bleaching or exfoliant effect; sunscreens;
hydrophilic or lipophilic cosmetic or dermatological active agents,
such as vitamins, antiseptics, anti-seborrhoeic agents,
antimicrobial agents, for instance benzoyl peroxide, salicylic
acid, triclosan, azeleic acid, niacin (vitamin PP), slimming
agents, for instance caffeine, optical brighteners, electrolytes,
agents having the effect of improving the cosmetic properties of
the skin, or spherical or non-spherical, porous or non-porous solid
particles of any size. The amounts of these various adjuvants are
those conventionally used in the field under consideration, for
example from 0.01% to 20% of the total weight of the composition.
These adjuvants and the concentrations thereof should be such that
they do not modify the property desired for the composition of the
invention.
[0084] As fillers, mention may be made especially of silica.
[0085] The compositions may also contain hydrophilic or lipophilic,
anionic, nonionic, cationic or amphoteric, thickening or dispersing
polymers, provided that they do not affect the qualities of the
emulsion or of the foam.
[0086] The emulsions according to the invention are preferably
obtained via a phase inversion process as described above.
[0087] More particularly, a preferred preparation process
comprises: [0088] 1) weighing out in a container all the
constituents of the composition (except for the foaming
surfactants, and heat-sensitive fillers and starting materials, if
any), [0089] 2) homogenizing the mixture, for example using a
Rayneri blender at 350 rpm, while heating by gradually increasing
the temperature using a water bath, up to a temperature greater
than or equal to the phase inversion temperature T2, i.e. until a
transparent or translucent phase is obtained (microemulsion region
or lamellar phase), and then until a more viscous white phase is
obtained, which indicates that the inverse emulsion (W/o) has been
obtained, [0090] 3) stopping the heating and continuing stirring
until the emulsion has cooled to room temperature, passing through
the phase inversion temperature. T, i.e. the temperature at which a
fine O/W emulsion forms, [0091] 4) when the temperature has fallen
below the phase inversion temperature region (T1), adding the
optional particles (for example silica), [0092] 5) at about
45.degree. C., adding the foaming surfactants, [0093] 6) at about
30.degree. C., adding the heat-sensitive starting materials
optionally present.
[0094] The temperature T1 corresponds to the formation of a
bi-continuous microemulsion; the mixture is translucent and
uniform; and the temperature T2 corresponds to the formation of a
water-in-oil emulsion; the mixture becomes opaque white and
thickens.
[0095] A stable O/W emulsion whose oil droplets are fine is
obtained.
[0096] In the region of formation of a microemulsion (translucent
mixture of micelles), the hydrophilic and hydrophobic interactions
are equilibrated since the surfactant has a tendency to form both
direct micelles and inverse micelles. By heating beyond this
region, there is formation of a W/O emulsion (opaque white mixture)
since the surfactant favours the formation of a water-in-oil
emulsion. Next, on cooling below the phase inversion region, the
emulsion becomes an O/W emulsion.
[0097] The compositions according to the invention are preferably
in the form of more or less soft creams, and they may especially
constitute cosmetic or dermatological compositions. They may be
used on any keratin material such as the skin, the scalp, the hair,
the eyelashes, the eyebrows, the nails or mucous membranes,
especially as hygiene products, for example as cleansing products
for the skin, mucous membranes and/or the hair, in particular as
cleansing and/or makeup-removing products for the skin (of the face
and/or the body), as shower products (two-in-one product), as
shampoos or hair conditioners, as shaving products, as rinse-off
masks, and as exfoliant products (also known as desquamating or
scrubbing products) for either the face or the body or for the
hands, after addition of exfoliant particles.
[0098] A subject of the invention is also the cosmetic use of the
composition as defined above, as a skin cleansing and/or
makeup-removing product, as a shower product, as a shampoo, as a
hair conditioner, as a shaving product, as a rinse-off mask or as
an exfoliant product.
[0099] Another subject of the invention is a process for cleansing
a keratin material, such as the skin, the scalp, the hair, the
eyelashes, the eyebrows, the nails or mucous membranes, wherein a
composition as defined above is applied to the keratin material,
and is rinsed off.
[0100] The keratin material is preferably the skin.
[0101] The compositions according to the invention are rinsed off
after application.
[0102] The compositions according to the invention may be used, for
example, in the following manner:
1) When the compositions according to the invention are gentle
facial cleansing products, they may be used in the following
manner:
[0103] the product is worked into a lather in the hands with
water
[0104] the lather is applied to the face
[0105] the face is washed
[0106] it is rinsed with water.
Result: the skin is cleansed without being attacked.
[0107] 2) When the compositions according to the invention are
makeup-removing products, they may be used as indicated above, but
they may also be applied dry to the face, and then massaged until
satisfactory makeup removal is obtained, and rinsed off with
water.
Result: makeup is removed from the skin without leaving an
unpleasant greasy residue.
3) They may be used as two-in-one shower products in the usual
manner for using shower products.
4) They may be used as shampoos and/or hair conditioners, as
shaving products or as rinse-off masks in the usual manner for
using these products.
[0108] 5) They may be used as scrubbing products for either the
face or the hands (when the composition contains exfoliant
particles. The use consists in applying the product to the face,
the hands or the body, rubbing for one or two minutes and then
rinsing off. The skin is then left smooth, soft and scrubbed.
[0109] The examples described below were subjected to viscosity
measurements to demonstrate their stability over time, and to tests
to test their foam qualities.
Foam Performance:
[0110] For some of the examples, the foam performance of the
compositions (foam qualities) were determined according to the
protocol described below.
[0111] Before any use of the product, the hands are washed with
household soap and then rinsed and dried thoroughly. The protocol
followed is then as follows:
[0112] 1--wet the hands by passing them under running water, and
shake them three times to remove the excess water,
[0113] 2--place 1 g of product in the palm of one of the hands,
[0114] 3--work the product between the two palms for 10
seconds,
[0115] 4--add 2 ml of water and work the product again for 10
seconds,
[0116] 5--rinse the hands in water,
[0117] 6--wipe them.
[0118] The criteria are evaluated at each step of the protocol
followed, and they are graded on a scale from 0 to 10. It is
considered that, for a given criterion, there is a difference in
grade between two products when the difference between 2 grades is
greater than or equal to 1.
[0119] step 3: evaluation of the covering power: the grade
allocated is proportionately higher the less visible the skin of
the hand when looking through the product spread thereon.
[0120] steps 4 and 5: evaluation of the foam quality [0121] The
volume of foam: the grade allocated is higher the greater the
volume. [0122] The size of the bubbles of which the foam is
composed: the grade allocated is higher the larger the bubbles.
[0123] The density: consistency or persistence of the foam: the
grade allocated is higher the greater the density. [0124] Softness
of the foam: the grade allocated is higher the softer the foam.
[0125] step 6: evaluation during rinsing: rinsing: the grade
allocated is proportionately lower the greater the presence of a
slippery film that is difficult to remove.
[0126] The evaluation panel consisted of 4 trained experts. The
average of the 4 grades allows a comparison of the compositions
according to each of the criteria.
[0127] The examples indicated below will allow the invention to be
understood more clearly without, however, being limiting in nature.
In these examples, the amounts indicated are weight percentages of
active material (rather than amount of starting material). The
compounds are cited as the chemical name or as the CTFA name.
[0128] The starting materials used in the examples were as follows,
the amounts thereof having been adapted to the amount of active
material in the examples:
(1) Eumulgin BA 10.RTM. sold by the company Cognis=oxyethylenated
(10 OE) behenyl alcohol
(2) Ethyl Hexyl Stearate.RTM. sold by the company Cognis=octyl
stearate
(3) Beaulight Shaa.RTM. sold by the company Sanyo=solution of
sodium lauryl glycol carboxylate at an active material
concentration of 29% by weight
(4) Oramix CG 110 sold by the company SEPPIC=solution of decyl
glucoside at an active material concentration of 60% by weight
(5) Aerosil 200.RTM. sold by the company Degussa
(6) Genapol LRO B.RTM.=aqueous solution of sodium laureth sulfate,
sold by Clariant, at an active material concentration of 70% by
weight
(7) 2-Ethylhexyl palmitate.RTM. sold by the company Stearinerie
Dubois=octyl palmitate
[0129] (8) Genagen KB.RTM. sold by the company Clariant or
Miritaine BB/FLA.RTM. sold by the company Rhodia or Empigen
BB/LS.RTM. sold by the company Huntsman or Dehyton AB 30.RTM. sold
by the company Cognis: solution of cocobetaine at an active
material concentration of 30% by weight.
(9) AKYPO RLM 45 CA sold by the company KAO.
EXAMPLE 1 ACCORDING TO THE INVENTION
[0130] TABLE-US-00001 Example 1 according to Compositions the
invention Beheneth-10 (1) 4 Octyl stearate (2) 50.4 Sodium lauryl
glycol carboxylate (3) 5.8 Decyl glucoside (4) 3 Propyl paraben
0.15 Methyl paraben 0.15 Chlorhexidine digluconate 0.25 Glycerol
6.5 Silica (5) 2 Ethanol 2 Sodium citrate 0.025 (as pH 6.9)
Deionized water qs 100% Appearance unctuous white cream that does
not flow Viscosity (Pa s) after 24 hours at 2.5 Pa s room
temperature (25.degree. C.) after 10 minutes of rotation of the
spindle.
[0131] TABLE-US-00002 Table of foam qualities Example 1 according
to the invention Initiation 7.5 Mixing with water 10.0 Homogeneity
10.0 Covering 6.3 Foam volume + 2 ml of water (step 4) 3.4 Bubble
size + 2 ml of water (step 4) 3.6 Density + 2 ml of water (step 4)
4.4 Foam volume + 4 ml of water (step 5) 5.0 Bubble size + 4 ml of
water (step 5) 4.1 Density + 4 ml of water (step 5) 4.1 Softness
6.5 Rinsing 7.6
[0132] These results show that the composition according to the
invention gives a foam that starts well, is homogeneous, has good
density and rinses off well.
EXAMPLE 2 ACCORDING TO THE INVENTION AND COMPARATIVE EXAMPLE 1
[0133] TABLE-US-00003 Comparative Example 2 of the Composition
Example 1 invention Beheneth-10 (1) 4 4 Octyl stearate (2) 50.4
50.4 Sodium lauryl glycol carboxylate -- 5.8 (3) Decyl glucoside
(4) 3 3 Sodium laureth sulfate (6) 5.8 -- Propyl paraben 0.15 0.15
Methyl paraben 0.15 0.15 Chlorhexidine digluconate 0.25 0.25
Glycerol 6.5 6.5 Silica (5) 2 2 Ethanol 2 2 Sodium citrate 0.025
0.025 (qs pH 6.9) (qs pH 6.9) Deionized water qs 100% qs 100%
Appearance unctuous unctuous white cream white cream that does that
does not flow not flow pH 6.9 6.9 Viscosity (Pa s) after 24 hours
3.7 6 at room temperature (25.degree. C.); after 10 minutes of
rotation of the spindle M3
[0134] The comparison of the foam qualities in the table below
shows that the composition containing Beaulight Shaa has better
performance in terms of foam initiation, the covering effect, the
volume and the density of foam compared with the comparative
example containing a standard surfactant such as sodium lauryl
ether sulfate. TABLE-US-00004 Table of foam qualities Example 2
Comparative according to the Example 1 invention Initiation 2.5 7.5
Mixing with water 10 10.0 Homogeneity 10 10.0 Covering 3 6.3 Foam
volume + 2 ml 2 3.4 Bubble size + 2 ml 3.5 3.6 Density + 2 ml 2.5
4.4 Foam volume + 4 ml 3 5.0 Bubble size + 4 ml 4.6 4.1 Density + 4
ml 1.3 4.1 Softness 6.5 6.5 Rinsing 6 7.6
EXAMPLES 3 AND 4 ACCORDING TO THE INVENTION
[0135] TABLE-US-00005 Example 3 (foaming makeup Example 4
Composition remover) (foaming) Beheneth-10 (1) 4 4 Octyl palmitate
(7) 40 -- Octyl stearate (2) -- 50.4 PEG-6 capric/caprylic 1.55 --
glycerides Sodium lauryl glycol 2.9 3.8 carboxylate (3) Decyl
glucoside (4) 7.2 3 Cocobetaine (8) 0.9 2.1 Silica (5) 2 2 Isononyl
isononanoate 12.4 -- Propyl paraben 0.15 0.15 Methyl paraben 0.15
0.15 Chlorhexidine 0.25 -- digluconate Glycerol 6.5 6.5 Ethanol 2
-- Deionized water qs 100% qs 100% Appearance unctuous white
unctuous cream that does white cream not flow that does not flow
Viscosity (Pa s) after 3.4 6 24 hours at room temperature;
25.degree. C.; after t10 minutes of rotation of the spindle M3.
Makeup-removing power 73% not measured
EXAMPLE 5 ACCORDING TO THE INVENTION AND COMPARATIVE EXAMPLE 2
[0136] TABLE-US-00006 Example 5 (foaming makeup Comparative
Composition remover) Example 2 Beheneth-10 (1) 4 4 Octyl palmitate
(8) 30.4 30.4 Liquid petroleum jelly 20 20 (mineral oil) Sodium
lauryl glycol 20 -- carboxylate (3) Laureth-5 carboxylic 20 acid
Propyl paraben 0.15 0.15 Methyl paraben 0.15 0.15 Silica (Aerosil
200 .RTM. from 2 2 Degussa) Isononyl isononanoate 12.4 12.4 Propyl
paraben 0.15 0.15 Glycerol 6.5 6.5 Sodium hexametaphosphate 2 2
Ethanol 2 2 Deionized water qs 100% qs 100% Appearance unctuous
white fluid cream that does composition not flow that is dephased
Viscosity (Pa s) after 24 3.6 Impossible to hours at room
temperature; get because 25.degree. C.; after t10 minutes of the
product rotation of the spindle M3. is dephased pH 6.0 Impossible
to get because the product is dephased Properties foams well does
not foam
The comparative example 2 shows that the aim of the invention is
not obtained when a carboxylic surfactant other than those of
formula (I) is used.
[0137] The above written description of the invention provides a
manner and process of making and using it such that any person
skilled in this art is enabled to make and use the same, this
enablement being provided in particular for the subject matter of
the appended claims, which make up a part of the original
description and including a foaming composition for topical
application in the form of an oil-in-water emulsion, comprising an
oily phase dispersed in an aqueous phase, wherein:
[0138] the size of the droplets of the oily phase D[4,3] is less
than or equal to 4 .mu.m,
[0139] the oily phase (A) is present in an amount of at least 30%
by weight relative to the total weight of the composition,
and in that the composition contains:
[0140] an emulsifying system (B) with an HLB value ranging from 8
to 18, present in an amount of at least 2% by weight relative to
the total weight of the composition,
[0141] a foaming system (C) comprising at least one anionic
surfactant chosen from alkyl glycol carboxylic acids and salts
thereof, of formula (I) below:
R.sub.1--CHOH--CH.sub.2--O--COO.sup.-X.sup.+ (I) in which R.sub.1
denotes a saturated or unsaturated, linear or branched alkyl
radical containing from 8 to 30 carbon atoms, and X denotes
hydrogen or a mineral or organic cation,
[0142] the oily phase (A)/foaming system (C) weight ratio ranging
from 1.5 to 12.
[0143] As used above, the phrases "selected from the group
consisting of," "chosen from," and the like include mixtures of the
specified materials. Terms such as "contain(s)" and the like as
used herein are open terms meaning `including at least` unless
otherwise specifically noted.
[0144] All references, patents, applications, tests, standards,
documents, publications, brochures, texts, articles, etc. mentioned
herein are incorporated herein by reference. Where a numerical
limit or range is stated, the endpoints are included. Also, all
values and subranges within a numerical limit or range are
specifically included as if explicitly written out.
[0145] The above description is presented to enable a person
skilled in the art to make and use the invention, and is provided
in the context of a particular application and its requirements.
Various modifications to the preferred embodiments will be readily
apparent to those skilled in the art, and the generic principles
defined herein may be applied to other embodiments and applications
without departing from the spirit and scope of the invention. Thus,
this invention is not intended to be limited to the embodiments
shown, but is to be accorded the widest scope consistent with the
principles and features disclosed herein.
* * * * *